Hard to say while running, definitely several drips while stopped. Also has a large buildup of caked oil all over the front engine area and underside of the truck is coated in a light covering of oil as well. Redokulous amount of oil covering the lower cross member under the radiator area.
I was assuming blow-by past the rings, but could this just be valves? There is also obviously multiple seal issues.
@Cass007 See the above post / Reply to the OP. The same thing applies to yours based on your description.
You also need to do the typical engine cleaning and re-sealing list. I would do all this FIRST.
Valve Cover Seal
Spark Plug Tube Seals
Throttle Body Gasket
Distributor O-Ring
Oil Pump Seal
Front Main Seal
Power Steering hoses
These are relatively easy with the exception of the Front Main Seal and Oil Pump seal that should be done together, as they require a torque wrench to go to 306 LB-FT on the harmonic balancer.